import { describe, test } from "bun:test";
import assert from "node:assert";
import path from "node:path";

// These testcases are specific to one uncommon behavior in path module. Few
// of the functions in path module, treat '' strings as current working
// directory. This test makes sure that the behavior is intact between commits.
// See: https://github.com/nodejs/node/pull/2106

const pwd = process.cwd();

describe("path", () => {
  test("zero length strings", () => {
    // Join will internally ignore all the zero-length strings and it will return
    // '.' if the joined string is a zero-length string.
    assert.strictEqual(path.posix.join(""), ".");
    assert.strictEqual(path.posix.join("", ""), ".");
    assert.strictEqual(path.win32.join(""), ".");
    assert.strictEqual(path.win32.join("", ""), ".");
    assert.strictEqual(path.join(pwd), pwd);
    assert.strictEqual(path.join(pwd, ""), pwd);

    // Normalize will return '.' if the input is a zero-length string
    assert.strictEqual(path.posix.normalize(""), ".");
    assert.strictEqual(path.win32.normalize(""), ".");
    assert.strictEqual(path.normalize(pwd), pwd);

    // Since '' is not a valid path in any of the common environments, return false
    assert.strictEqual(path.posix.isAbsolute(""), false);
    assert.strictEqual(path.win32.isAbsolute(""), false);

    // Resolve, internally ignores all the zero-length strings and returns the
    // current working directory
    assert.strictEqual(path.resolve(""), pwd);
    assert.strictEqual(path.resolve("", ""), pwd);

    // Relative, internally calls resolve. So, '' is actually the current directory
    assert.strictEqual(path.relative("", pwd), "");
    assert.strictEqual(path.relative(pwd, ""), "");
    assert.strictEqual(path.relative(pwd, pwd), "");
  });
});
